Driving mechanism for hoists



Aug. 31, 1943. R; B. MAGEE 2,328,088

DRIVING MECHANISM FOR HOISTS original 'Filed Dec. 24, 1940 2 sheets-sheet 1 A rsi ATTORNEY Aug. 31,' 1943. R. B. MAGEE DRIVING MECHANISM FOR HOISTS Original Filed Dec. 24, 1940 2 Sheets-Sheet 2 .EAS-

ATTORNEY N ,UNITE Dfi-STAT Patented Aug.` 31, 1943V Es PATENT VOFFICE aszaosa "DRIIVINGMCHANISM1791iHIS'rs1 'f nwertnivrareerinmay, om, mmm, The e e y f fBnckeye Traction Ditcher Company,

hio,ia corporation of Ohio Original applicationhecember 24k,` `1i94IL`Seriall\lo'.` 5 371,507.` "Divided and this applicationJuly 13,"

k1942, serials. 450,139 e 5 a i4 einmal (ci. '14e-Qur) This inventionrelates to drivingmechanisms `particularly adapted for drivingarhoist or a winchmounted at the rear end of a tractor `of the type used` for raising orlowering earth worktools" such as bulldozers; operatingA Scrapersy which are towed by thetractor` and'for numerous ,other purposes, `but "more particularly to "mechanism oran adaptor interposed between the trac-` tor` operating motor andthe hoist for establishing the drivebetween these parts,` `in the desired manner." 'Ihis application constitutes a division of my i application ser1a1No.3'r1,5o'z med December 24,

1940, emmen @Hoist driving mechanismyl An` object is to `provide a hoist drivemecha` nism of the'above character `with means for militating against actuation of one of the clutchi members to operative clutching position until the other clutch memberis disposed in neutral-posi` tion "and positively holding `the latter clutch `member in neutral position until the first clutch` member'isretumed' to its inoperative position.

` Other objects-and advantages reside in details oi construction, arrangement and operation and for purposes of *illustration but not of limitation,`

an embodiment of theinvention is shown in the `accompanying drawings in which Figurel is a vertical sectional elevation ofi the driving mechanism for a hoistwith the clutches arranged for normal `driving of a hoist, part of which is broken away and indicating the motor i driven shaft leading 4from the tractorV operating` motor;

" l "Figure 2` is enlarged` transverse sectional` elevation on the line 2`2 ofFlgure 1; and

, Figure V3` is an enlarged side elevation of 'the` adaptor showing the `clutch operating levers and showing the position assumed` by the` parts when` bothclutches` are in neutral position. w 1 The illustrated embodiment ofthe invention comprises a hoist H which is ysuitably mounted at the rear end of a tractor (not shown). The

`details of constructionof the horsemen ne pm e of thepresent invention so that detail descrip`` tionand illustration thereof `are not considered power from a driving shaft I1.

I I is a bevel pinion|2l secured to` a driven shaft I3,` The shaftv I3 issuitably mounted in anti-` friction bearings I4 mouri` hoist casing i I5. i

` Fitting against therear face of the hoist casingfiis a relatively oil-tight casing IB which houses theA driving Emechanism which receives" its may` be an extension of the drive shaft to the` tractor motor or may be a separate shaft suit-` ablyY connected for operation by ,the tractor mo- `tor so as Ato be rotated continuously in one direc,-u

available for operatiom" 4 `The innerY end of the `hoist driven shaft I3 is` provided withllongitudinal splines as indicated at I8 Lto receive a `gear member Iii having ex`` ternal gear teeth `and internal gear teeth 2I.f

tion so long as it is desired to havel the -hoist H `The extreme endportion of the driven shaft I3 is screw-threadedas indicated at22 to receivea suitable fasteningxdevice 23 for securing the gear member I9 in place. Axially aligned withthe driven shaft I3 and having its innerend spacedV a short distance from` the adjacent end of thep `hoist jdrivenjshaft` I3 is a; supplementaldriven shaft `24 which is Isuitably supported by` ant`` friction bearings 25; a bracket 23 for'minga partA of the housing I3; The inner end of the supple#v mental driven shaft 24 has a series of splines 21 to receive a gear clutch member 28 which is likewise splined to interfitwith the splines`2i and l j is mounted for longitudinalshifting movements necessary. Suffice itto say that the hoist H is provided with one or more drumson which `a cable: or cables are wound, `the drums being ro-` acter is shown and described inthe patent to Frank P. Lawler, No." 2,199,668, -dated May 7, 1940,` for Hoist `The hoistlis` providedwith a drum operating shaft III towhich a beveled gear `II is secured `and meshing with thebeveled gear tatable iny opposite directions to wind up or pay out the cable as desired. A hoist of thschar eratinggyoke "32 is fixed toa transverse shaft 33 which is suitably'mounted inl-the housing I6"and forcentering purposes is engaged at one endby ayboltf34 `which is secured `in place by a nut 35;`

The `opposite end ofthe shaft 33 `projects out" Wardlyof `the housing IIi` andi sleeved thereupon isa fhubportion 36`lof an operatinghandle` 31, the'hub portion `being fixed to the shaft33 for, turning movements therewith. It will be mani fest that by actuation `o f `the handle 3lthe` gear clutch 28 maybe slidli'ntoand'out of engagew ment with the internal gear 2 I. i f i i The clutchy actuating` yoke ;32 is yieldably retained either in Lthe` inoperative position i of `the ld in aportion of the"` The shaft I1 coil spring 42.

` the yoke. The ball 38 is urged outwardly of a cup L4I carried by a side wall of the housing I6 by a The spring 42 bears at one end against the ball 38 urging it outwardly of the cup and at the opposite end abuts against the inner end f the Cup.

The supplemental driven shaft 24 is driven by`lv f, i

described, the cable drum may be reversed and the 'motor which operates the shaft I1 may serve f as a brake tocheck the rotation of the hoist drum the motor driven shaft I 1 and in the same direction of rotation as the shaft I1.' Inthisjinstance,

the operative driving connectionl between these shafts is eifected by a sprocket member 43 which is splinedy to and slidable axially of the` motor.. driven shaft I1 and a sprocket member- 44 which is suitably fixed to the supplemental driven shaft 24 for rotatio-n therewith. In this instance each 20 of the sprocket members 43 and 44 are-formed with four Aannular series of sprocket teethand the opposite sprocket teeth of one of the members is connectedto the corresponding sprocket of the other mem-ber by chains 45. A sprocket and chain connection of this character is of particular advantage in that iis-enablesA the supplemental driven shaft 24to bey rotated in the same direc-- tion as the motor vdriven shaft I1 which is disposed parallel thereto but spacedflaterally therefrQm he motor driven shaft I1 `is suitably mounted iny anti-friction l bearings,A .46," carried vby the face plate 41 of the housing I6 and fdisposed in alignment with but spaced slightly therefrom is a supplemental driving shaft 41 which has a splined end portion 43 to receivev agearclutch member 49h'aving an external gear 50 which is movable,

axially to andfro-m meshing engagement with an internal gear 5| forming arrintegral part of the sprocket memberv 43 .at the, inner end thereof.4

The gear clutchA member 49 shifted axially along the splined end portion 48 ofy the supplemental 'shaft bya yoke V52 which lis similar to the yoke 32 above described. The` yoke 52` is similarly mounted to the yoke 32 and is provided with an operating handle 53 (Figure 3) which is in all respects identical to the handle 31 above described. In view ofv the similarity of these parts further detail description of the yoke 52 and its associated parts isnot yconsidered necessary since the same rwill be readily understood by those skilled in' this art.

. The supplemental driving shaft ,suitablyv mounted in anti-friction bearings 54 carried by the housing I6 and rigidwith the opposite end portion thereof is anexterrhialv gear 55 which is at all times in mesh wththegear which,vas above described,is fixed forrotation with the hoist driven shaft I3.v y v 7It will be understood'that the'housing I6 is normally yfilled with oil so that the various-parts run in a ybath of oil, a suitable breather 56 being provided for venting the interiorof the housing.

It will be manifest that -when the -gear clutch member is engaged with the internal gear 2|,r the hoist shaft I3 'will be rotated in the same direction as the motorxdrivenshaft I 1.r At 'this time the gear clutch 49 is disposed in inoperative position with the gear shifted away fromj the gear 5 I On Athe other hand, with' the gear clutch 28 shifted to inoperative position or to such positionv that ther gears-29ahd 2I are out of mesh,

the clutch member 49 maybe shifted to operative position to b-ringlthe gears 50 and 5I into mesh. With they parts in this position, theV hoist shaft .rotate the cable drum in the opposite direction and. by shifting the clutch members as above Lit/1s .important that while one of the clutch members28and 49 is in operative position that the other clutch member be retained in inoperative position. For this purpose, each of the operating handles or levers 31 and 53 is provided with a laterally extending arm 51 to which a pin 58 is pivoted. The free end portion of each,v of the pins 53 passes through `a boss 55.` When both of the operating handles 31 and 53 .are in neutral position, the operating levers or handles 31 and 53 are in the positions indicated yonFigure 3 the pins 58 yprojectimgi; through their .respective bosses 53 and terminating close to but out vof engagement withthe opposite operating handle. As shown each of the handles 31 and 53 are provided adjacent their outer ends with an arcuate portion or sector of suchpcurvature'thatthe respective handle can be rocked without interference from 4the pin '58 of the lother roperating handle.l However,-upon swinging movement-of either of the operating handles 31and 53, it will be apparentythat the respective pin 58..:is forcedl longitudinally through the respective boss 59 and`v into a socket 6I formedin the-other operating handle, a. sufciently loose'iit between the pin; 58 and boss,58 enabling this movement to be accomplished.v It is manifest that when one of the pins is in engagementwith the socket iIy of..

f understood that both `of the operating handles 31 and 53 must again be' in neutral position or in the position indicated on lFigure 3 before the other operating handle can be actuated andv at that time the rst operating handle is positively retained in neutral position. As above indicated.v both the operating handlesand associated parts are similarly constructed so 'thatvdetail'description of one is deemed suicient. y 'e It is apparent that the hoist driven shaft I3 isspaced vertically above the tractor driving shaft I1. VAThis. is advantageousbecause itenables the hoist H tov be raised above the usual drawbar of the tractor. It is to be understood that the hoist may belmounted at any desired place on the tractor and accordingly the drive mechanism above rdescribed may be mounted at the rear, sides or front of the tractor as `desired gependlng upon the position of mounting for the oist.

It is to be understood that numerous changea in details of construction, arrangement and operiA ation may be effected without departing from the spirit of the `invention especially as, denedgin the appended claims., l

What I claim is:

` f. l; In a hoist drivingmechanism having a pair a ofclutching members alternatively movable into a operative driving relation, means to insure that one clutch member is in inoperative position be` fore the other clutch member is actuated to oper` ative position, said means comprising a pair of r i levers arranged `in ofl'set relation, eachlever hav` ing ia laterally projecting arm, a rod pivo-tedto .the outer encl` `ofeach arm, a frame member interposed between said levers and apertured to testes one clutch is in inoperative position before `the other clutch member is actuated to operative position, 'said meanscomprising a rocking handle connected to each clutch member, and a latching member connected-to each handle and movable therebyinto and out of latching engagement with `the other handle. f Y l receive said rods respectively, each rod being dis-a` 4posed in substantially parallel relationship tov the respective lever, an arcuate surface on theend portion of each lever over which the end portion ofthe: rod of the otheriiever is adapted to ride, each lever being socketed to receive the end portion of the rod eonnectedto the other lever so against movement.

p that when the latter "is actuated to `operative"` position, the respective rod locks the other lever 20` 2. `In a hoist driving `mechanism having a pair of clutchmembers `alternatively movable into operative drivingrelation,V means to insure that i `actuate its clutch memben` p 4. In a hoist driving mechanism as claimed in 1 claim 2, each rocking handle comprising an arm` extending" at right angles` to the handle, a rod` 3. In a hoist drivingmechanism as claimed in claim2, `the rocking handles being arranged in superposed oifset relationship, and a pivotally mounted detent movable into socketed .engagement with the other handle to hold` the latter stationary 'when .the first handle is rocked to` pivotally connected to saidl arm, a frame member apertured to receive saidrods, and eachhandle` having a socketed portion to receive the rod of the other handle when the latter is rocked to actuate its clutch member thereby to hold the ,former securely in position. a Y

` `ROBERT B. MAGEE. 

